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added a new ia32 macro for the mov eax opcode

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cleaned up a bit of the crit hook code

--HG--
extra : convert_revision : svn%3A39bc706e-5318-0410-9160-8a85361fbb7c/trunk%402152
This commit is contained in:
David Anderson
2008-05-17 08:30:17 +00:00
parent b2fbd9691d
commit 8ad5d61878
2 changed files with 16 additions and 13 deletions
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extensions/tf2/criticals.cpp
+9 -13
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@@ -88,13 +88,11 @@ bool CriticalHitManager::CreateCriticalDetour()
//If TempDetour returns non-zero we want to load something into eax and return this value
//IA32_Test_Rm_Reg(jit, eax, eax, something);
jit->write_ubyte(0x85);
jit->write_ubyte(0xC0);
//test eax, eax
IA32_Test_Rm_Reg(jit, REG_EAX, REG_EAX, MOD_REG);
//JNZ critical_callback+50
jit->write_ubyte(0x75);
jit->write_ubyte(50-((jit->outptr+1)-jit->outbase));
//jnz _skip
call = IA32_Jump_Cond_Imm8(jit, CC_NZ, 0);
/* Patch old bytes in */
for (size_t i=0; i<critical_restore.bytes; i++)
@@ -106,13 +104,11 @@ bool CriticalHitManager::CreateCriticalDetour()
call = IA32_Jump_Imm32(jit, 0);
IA32_Write_Jump32_Abs(jit, call, (unsigned char *)critical_address + critical_restore.bytes);
wr.outbase = (jitcode_t)critical_callback+50;
wr.outptr = wr.outbase;
//copy g_returnvalue into eax
jit->write_ubyte(0xA1);
jit->write_uint32((jit_uint32_t)&g_returnvalue);
//_skip:
//mov eax, [g_returnvalue]
//ret
IA32_Send_Jump8_Here(jit, call);
IA32_Mov_Eax_Mem(jit, (jit_int32_t)&g_returnvalue);
IA32_Return(jit);
return true;